I suggest that you use Uniden BCDx36HP Sentinel to create favorites lists of only what you want to hear. Create a favorites list for St Louis Co and save it. You can go into the USA database, find Minnesota, St Louis Co, Statewide, ARMER, St Louis Co. Highlight St Louis Co. Click on the gold star at the top of the page (Append) and select the favorites list you just created. St Louis Co will now be on that favorites list. Go to menu. Set scan selection, select lists to monitor, turn off full database and search with scan and turn on St Louis Co. When you exit the menu (press the system button) you will be scanning only St Louis Co. You can further edit the favorites list to eliminate anything that you do not want. Read the Sentinel manual to become familiar with it. This is just the beginning of a learning experience.